Pencil sharpener



Api@ 25;, 1933.

H. w. SCHOENFELDT L PENCIL SHARPENER Filed Aug. 6, 195o 2 sheets-sheet 1 @ggf pl'i 25 H933 H. w. SCHOENFELDT 1,905,608

PENCIL SHARPENER Filed Aug. 6, 1950 2 Sheets-Sheet 2 @Zigi Patented Apr. 25, l19733 UNITED vfermiai-s HENRY W.soHonNrnr.DT, .on onnesmown, enrol smic-1 1, sHABnNER .apparaat nea. wenn eine sans Natta-49.1, l

This invention relates to pencil sharpeners.

The most'commonly used forms of peneil Sharpeners require the use of both hands for the manipulation of the same, the pencil being held by one vhand and the cutters or eutter head being actuated by the other hand.

One important objectbf the present i11- vention is to provide a novel form, of pencil lo VSharpener wherein the hand 'hold-ing the pencil is also used to manipulate .theSharp- .ening mechanism.

A second important object of .the lIlYention is to provide an improved form Of Such mechanism which maybe taken apart with ease for the purpose oi sharpening .or re acters of referenceindicate likdparts-in the several views, and:

Figure l is a sidelelevaton of one form of the improved `pencil sha1' ener I ligure 2 is a section. on t e line Qf 4Figure l.

VFigureis a sectiononthe line 3-3 of .Figure2.

Figure Llis a section on line ef- Figure2.;

YFigure A5 is a View similar Yto Figure 2 but showing a modified form Lof the.' pencil Sharpener,

.Figure `(i .is Figure 1 5.. l

In both'ormsfof 4the device .therefis provided .a cylindricaljcasing body 10, The lower -end `of this body s closodby a; closure plate 11 having a peripheral flange .lWhioll is provided with bayonet- Slotsleoeperata` section on `.the line of lo to hold this .lowor ond ninfposton, A felt or other Suitablepad l5 .be ..seoured to the closure lplato 11 to prevent. matting .furniture on Whioh the dovios plaoed. Aljson each of the .forms thoreis provided@ .top 16 havnga peripheral flange 17 'screwed Onto the., upper .ond ot' 'the hodi., 1.0? This .top

1 6 has acentral pencil Vreceivi'rrgl opening vfrom which depends aguidetube `.1,7 L .J ust below the lower v.end of thef g uide.t1ibe11",.

the body lOis provided with'inwardly pro- Ajeotiig lugs 18 whoreoh rests a 'partition 'i platelt) holdtoth lugs .by SorewsZOL This partition plate vhas fa' centrally-1disposd openmg Surrounded by a rabbet 2.1. The

cutter head in each. form has a body 2,52 prioi vided .adjacent its upper ,ond With @dangle 23 Whichhears againstthe lowerlfaoe othe plate 19the upperfendof the body fitting in 0f thsbody islikowise .provided with .a

Solrowtjlreaded. Socket. forthe reception .of a

.tubular mombewhavng a dans@ 25 vWhich tits 1n the rabbet 2l.; By this'means the Cutter head .is revolubly mounted rltho plate.

19 and idhold from dsplaoment .with referento thereto. .Brolo/@tins dwwardly from .the lower'elid .of the head 22 iS @Shaft 2.6 whiehseatsin afsoeket 27 positioned centrally ofthe plato 1.1 sothlattho .Cutter head is .supported for f'rotation both ,atits upper"` .and lowerlends. Theluppor part di'the. Cutter head 'and the member 24.:4 are provided with 'a .oylhdrioal @1562.8 forming .afoofne tmlatoi ofthehore 'of the .tubo 1.7.- A the lower end this 'bore .is .continued downward-' aoonoal oXtohsion29 andthe `@mater head,

at this eoncalvextonson., islo'iit away as at oinllgure fl, to provide a flat surface against which. maybe positioned a .knife 31 held in adjusted relation .tov-:the axis .of the @letterhead by 'screws .passing through Slots 33. By means of this constructionthe :knife 'maybe' adjusted infor out .toward-the .asis .or maybe removed for; .Sharpening or replacement. f Extending downwardlythrough the .Shaft 26;@ @massage .Se'orkod at'ts loafer endto open outwardly through the Sides' ofthe .Shaft 5o ,ging with pinsld projeeting from as atj. l This passageis to convey'the Serap-V -theopening of .said plate.: Theupperend ..70

shaft is fixed a spur pinion 41 wherewith meshes a vertical rack 42 passing upwardly through a guide 43 on the plate 19 and through a guide 44 on the top 16. Therack 42 is continued upwardly in a rod 45 terminating at its top in a head46. Projecting upwardly from the lower plate 11 is a small tube or guide 47 and projecting downwardly `from thelower end of therack 42 is a stem 48 which slides in this guide, a spring 49 surroundingthetube 47 and stem 49 and norfinally holding the plunger formed by the'rack and rod 45 with" its head 46, in a raised position. VA guard tube 50 surrounds the spring and lower parts of the plunger to prevent clogging by the chips and dust which collect in the lower part of the casing because ofthe operation of the device.

In the form of the invention shown in Figures and 6 the cutter head carries a worm or spur gear 5l vwherewith meshes a multiple threaded worm 52'sliding through a guide 53 on the plate 19. Thisworm 52 hasa rectangular opening therein which receives a rectangular guide bar 54 projectingup from the bottomplate 11v so thatthe'worml 52 may move vertically but cannot rotate. A spring 55 'surroundsthe' bar 54 and'normally holds the worm raised. A guard sleeve or tube 56 surrounds theV spring and'is of suiiicientsize to permit worm 52 to descend therein, this sleeve-56 serving'to prevent the chips and dust from interferring with thespring.V YA 'stem 57 extends upwardly througha guide 58 Von the top plate and terminates in a head 59.

that it may be necessary to malreseveral upY 'and down movements of the plu nger,`espe cially with apencil which'has never before been sharpened but in all instances the same hand that operates theplunger holds' the pencil. l Y .t

There hasthusbeen providedV asimple and efficient device of the kind described andfor the purpose specified.

-It isY obvious that minor changes'ma'y'be made in the form and constructionof the "invention without departingfrom the material spirit thereof.4 It is not, therefore, desired with said pinion.

to confine the invention to the exact form herein shown and described, but it is desired to include all such as properly come within the scope claimed.

Having thus described the invention, what is claimed as new, is:

In a pencil Sharpener, a casing, a partition plate spaced below the topof the casing and having a central opening therein, a cutterheadhaving its upper end fitting revolubly in said opening, a flange on said cutter head below the plate and bearing on the under side thereof, a securing member Y screwed in said head'and bearing against the upper side of the plate, a plunger extending from said casing parallel to the axis 'of and adjacent said cutter head, and gearing connecting the plunger and'cutter head to rotate the 'latter y upon depression of the plunger. Y

. 2. In a pencil Sharpener, a casing, a partition plate spaced below the top lofthe casing and having a central opening therein, a cutter head having its upper end fitting revolubly in said opening, a flange on said cutter head'below'the'plate and bearing on the under side thereof, a securing member screwed in said head and'bearing against the upper side of the plate, a plunger extending from said casing parallel to the axis of and Vadjacent said cutter head, gearing connecting the plunger and cutter head to rotate the latter upon 'depressionof the plunger, and spring means normally holding said plunger raised.

3. In a pencil Sharpener, a casing, a partition platespaced below the top of the casing and having a central opening therein, a

cutterhead having its upper end fitting rev-y olubly in said opening,` a flangeon said cutter head below the yplate and bearing on the 4under lside thereof, a securing Vmember screwed in vsaid head and bearing against the upper Vside of the plate, a bevel gear surrounding and carried by the cutter head, a

bearing depending from said'plate, a shaft mounted in said bearing, a second bevel gear meshing with the first gear and fixedvon the inner end of said shaft, a spur gear fixed,-v onY the outer end of said shaft, andaplunger extending downwardly through the top of the casingY and including a rack meshing 4. In a pencil Sharpener, a casing,

and having: `a central opening therein, a cutter` head having its upper end fitting revolubly in said opening, a flange on said cutter head below the plate and bearing on the un-n der side thereof, a securing member screwed in saidA head and bearing yagainstthe upper side ofthe plate, a bevel gear surrounding A carried by the cutterhead, a bearing depending'from 'said` p1 ate,a shaft mounted in sa-id bearing, a' second bevel gear meshing v p p a parti- Y `tion`plate spaced below the top of the casing with the first gea-r and lixed on the inner end of said shaft, a spur gear. fixed on the outer end of said shaft, a plunger extending downwardly through the top of the casing and including a rack meshing with said pinion, and spring means normally holding said plunger raised.

5. In a pencil Sharpener, a casing, a partition plate spaced below the top of the casing and having a central opening therein, a cutter head having its upper end fitting revolubly in said opening, a flange on said cutter head below the plate and bearing on the under side thereof, a securing member screwed in said head and bearing against the upper side of the plate, a worm gear surrounding and carried by the cutter head, al plunger extending downwardly through the top of the casing and including a multiple threaded worm meshing with said gear, and means to guide said plunger and hold it against rotation.

'6. In a pencil Sharpener, a casing, a partition plate Vspaced below the top of the casing and having a central opening therein, a cutter head having its upper end fitting revolubly in said opening, a flange on said cutter head below the plate and bearing on the under side thereof, a securing member screwed in said head and bearing against the upper side of the plate, a worm gear surroundingV and carried by the cutter head, a plunger extending downwardly through the'top of the casing and including a multiple threaded worm meshing with said gear, means to guide said plunger and hold it against rotation, and spring means normally holding said plunger raised.

7. In a pencil Sharpener, a casing, a cutter head rotatably mounted in said casing, a plunger extending from said casing, parallel to the axis of and adjacent said cutter head, gearing connecting the plunger andcutter head to rotate the latter upon depression o the plunger, a stem extending downwardly from said cutter head and provided with a dust escape opening, and avguide seat on the bottom of the casing receiving and guiding the lower end of said stem.

8. In a pencil Sharpener, a casing, a cutter head rotatably mounted in said casing, a

plunger extending from said casing, parallel to the axis of and adjacent said cutter head, gearing connecting the plunger and cutter head to rotate the latter upon depression of the plunger, spring means normally holding said plunger raised, a stem extending downwardly from said cutter head and provided with a dust escape opening, and a guide seat on the bottom of the casing receiving and guiding the lower Vend of said stem.

In testimony whereof I aiiX my signature.

HENRY w. scHoENFELDT. 

